I still shoot 1 oz. for vintager type sxs competitions but I often use 7/8 oz. loads for dove and informal clays. I don't really see much of a handicap shooting the lighter loads.

Some of my guns are from the late 1870s and early 1880s and I feel better shooting lighter loads in them. They aren't fragile, I just think less stress is a good idea especially since 7/8 oz. 12 ga. loads are plenty effective. A few of my guns have had wood cracks repaired and light loads are in order. I do beat guys shooting autos and o/u guns pretty regularly at the local 5 stand. All of them shooting hot 1 1/8 oz. loads. It pleases me to show them the error of their ways!